Hip Passive Motion Machine
Last year, approximately 30,000 individuals in the United States underwent surgery to repair a
torn acetabular labrum. The acetabular labrum is a ring of fibrocartilage that forms a ring
around the acetabulum of the pelvis. Acetabular labral tears are severe injuries that require
surgery to repair. Without surgery, patients are unable to return to their previous levels of
activity. There is a labor-intensive rehabilitation routine post-surgery, comprising several
interventions, which facilitates the healing process.
The focus of this project is to design an assistive
device to provide passive hip circumduction. Circumduction is defined as moving
the joint in a circular motion. Passive motion means that the patient is not actively contracting
any muscles during the intervention. At present, a caregiver performs hip continuous passive motion daily
for two to four weeks, post-operative. This method to provide passive circumduction is physically demanding on the
caregiver and leaves the patient dependent on this person to expedite the healing process.
1. Here is what one senior design group came up with elsewhere - However, there are numerous issues with this machine!!
2. A movie of the process is included here: http://www.coe.montana.edu/me/ME_MET_Capstone/Capstone%201%20Fall%202012/Project%20Descriptions/hipcircumduction.MOV
Sponsor: Dr. Laura Stanley and Great Northern Physical Therapy